Fiber box



H. H. LINDLEY Oct. 15, 1940.

FIBER m Filed March'Sl, 1939 2 Sheets-Sheet l Harry L; @W@

Oct. 15, 1940. H. LlNDLEY I 2,217,757

FIBER BOX Filed March 31, 1939 2 Sheets-Sheet 2 D. f 6" f [9/ j Jim77207 H07 H Lind/e Patented Oct. 15, 1940 UNITED STATES FIBER BOX HarryH. Lindley, Marion, Ind., assignor to Lindley Box and Paper Company,Marion, Ind., a corporation of Indiana Application March 31,

4 Claims.

This invention relates to cartons or; fiber board boxes of that typewhich are formed in flat blanks and then folded to be set up andenclosed by overlapping flaps requiring adhesive to retain the flaps inclosed positions.

A primaryobject of the invention is to form a carton or box in suchmanner that in the process of manufacture the adhesive may be applied toall of the required flaps in a single op- -1 eration by passing thecarton in flat form through the usual and well known type of adhesiveapplying machines whereby the adhesive is applied at both ends of thebox on extending fiat ends.

A still further important object of the invention is to provide a boxwith overlapping sealing flaps which have a plastic adhesive carriedthereby forming a permanent seal upon contact of one adhesively coatedflap over another adhesively coated flap, and yet permitting the box tobe stacked one over another in flat form with the adhesive sides of theflaps of one box being contacted with the non-adhesive sides of theflaps of another box, all without any tendency for the adhesive toadhere to the next adjacent box.

The invention permits the forming of a box that may be shipped in fiatform with the adhesive already applied to the sealing flaps of such acharacter that all that is required of the user is to press one flapover the other to complete the sealing operation without furtherapplication of adhesive orwithout having to heat or moisten theadhesive. I

It is a further important object of the invention to form an exceedinglysimple blank for a box of the above indicated characteristics, whichblank may be produced without complicated dies or cutting work.

These and other objects and advantages of the invention will becomeapparent to those versed in the art in the following description of oneparticular form of the invention as illustrated in the accompanyingdrawings, in which:

Fig. 1 is a top plan view of a blank;

Fig. 2, a top plan view of the blank following its initial foldingoperation and following the application of the adhesive;

Fig. 3, an end elevation of the blank in that form as shown in Fig. 2; v

Fig. 4, a view in perspective of the box as further set up from the formas shown in Figs. 2

. and 3;

Fig. 5, a front elevation with the under-side 1939, Serial No. 265,070

(Cl, 229-37) r of the box closed and the upper end partially closed; andI Fig. 6, an end elevation of the completed box.

Like characters of reference indicate like parts throughout the severalviews in the drawings.

Referring first to Fig. 1, a blank is formed to have a centralrectangular portion ABCD and this portion is divided into front, backand end panels by the score lines EF, GH, and IJ. Extending integrally,respectively from both the top and bottom lines of the panel AEFD arethe tongues l0 and I5. From the end panel EGHF extend-integrally,respectively the tongues l6 and Il, both being identical in dimensionsand.

2 each extending outwardly further than the adja cent shorter tongues l0and I5.

From the next panel GIJH extend integrally therefrom the respectivetongues [23 and l 9, both tongues extending outwardly to the samedistance as do the tongues I6 and IT. From the next adjacent panel IBCJintegrally extend therefrom the tongues 20 and 2| a distance equal tothat of the tongues l0 and I5. The tongues are each separated one fromthe adjacent tongues by cuts through the blank that each tongue mayhinge independently of the other tongue from the top and bottom edgesrespectively of the major portion of the blank, these top and bottomlines preferably being score lines across the junctions, of therespective tongues and panels, that is, the lines AB and DC arepreferably defined by score lines. A laterally extending tongue 22extends from the outer marginal end AD of the central blank portion, theblank being preferably scored along the line AD to permit ready bendingof the tongue along that line.

The blank thus formed, Fig. 1, is then folded along the score lines EFand IJ to bring the lateral tongue 22 over on top of the panel GIJH andhave the panel IBCJ lap over on top of the tongue 22 and be adhesivelyunited therewith.

While the box blank is in this flattened form, adhesive is appliedacross both ends outwardly from the lines EI and FJ to coat both tonguesl0 and 20 and the protruding'ends of the tongues I6 and i8 at the oneend and the tongues l5 and 2| as well as the protruding ends of thetongues I I and [9 at the other end, Fig. 2. This adhesive is preferablya latex, either natural or synthetic, which may be applied, asindicated,

to the various tongues in a. liquid state to dry somewhat rather quicklyand then be non-adhering to a non-coated blank part when placedthereover, but will very securely adhere to the adhesive or anothercoated part when pressed thereover.

Following the adhesive application step, the box is ready for shipmentor delivery to the user who sets up the box by pushing on the edges EFand U to carry the blank, Fig. 3, into boxshape as shown in Fig. 4, withthe various tongues extending outwardly from the side and end panels. Asindicated in Fig. 5, the tongue 20 is bent inwardly and the tongue I6 isfolded thereover to have the adhesive coating of the tongue 5 contactwith the coating on the tongue 20 so that these two members may thenbecome adhesively united thereby.

Next, the tongue II is folded over the tongues 16 and 20 and the tongueI8 is folded down over the tongue ll to have the two adhesive surfacescontact one another to form the bond or seal so as to retain the tonguesin the closed positions. It is to be noted that in the particulardimensions selected for the example herein, the tongue [6 does not reachentirely across the tongue 20 but that the tongue I! does come entirelyacross over the tongue III to the line EA so that all of the adhesivecoating of the tongue I is completely covered. The tongues on the otherend of the box are similarly carried to the closed positions andadhesively retained in those positions by first bringing the tongue 2|inwardly and the tongue I I thereover, followed by folding in the tongueI and then folding the tongue l9 over the tongue 15.

As above indicated, the particular form of box herein illustrated anddescribed is but one possible example of the'invention. It is obviousthat the proportions of the sides and ends may be varied and also theparticular shapes of the overlapping tongues. Furthermore it isimmaterial whether the lateral tongue 22 extends from the line AD orextends from the other end of the blank from the line BC, and it,therefore, becomes obvious that structural variations may be employedwithout departing from the spirit of the invention and I, therefore, donot desire to be limited to the precise form herein shown and describedbeyond the limitations as may be imposed by the following claims.

I claim:

1. For a set-up carton, a folded carton blank having side wall sectionsconsecutively connected one with the other along corner fold lines, saidblank being flattened to have two adjacent side wall sectionsoverlapping and resting on two other adjacent side wall sectionsthereunder, each of said sections having a tongue extending respectivelyfrom its top and bottom ends, the tongues extending from said underadjacent sections being longer than said upper tongues to have endportions exposed beyond the overlapping upper tongues, and a plasticadhesive on and limited to the exposed end portions of said undertongues and also on the upper the upper tongues.

2. For a set-up carton, a folded carton blank having side wall sectionsconsecutively connected one with the other along corner fold lines, saidblank being flattened to have two adjacent side wall sectionsoverlapping and resting on two other adjacent side wall sectionsthereunder, each of said sections having a tongue extending respectivelyfrom its top and bottom ends, the tongues extending from said underadjacent sections being longer than said upper tongues to have endportions exposed beyond the overlapping upper tongues, and a plasticadhesive on and limited to the exposed end portions of said undertongues and also on the upper faces of the upper tongues, said adhesivebeing characterized by tenacious adherence to said tongues faces of whenapplied, but, following a drying period,

remaining plastic and bonding securely with like adhesive, while havingsubstantially no permanent adhesion with surfaces uncoated with theadhesive, whereby the blanks with adhesive coated tongues may be stackedone on the other for storage and shipping, and the blanks be eventuallyfolded into cartons with the longer tongues folded over onto the shortertongues to bring the adhesive surfaces together for bonding and formingsealed carton end walls.

3. For a set-up carton, a folded carton blank having side wall sectionsconsecutively connected one with the other along corner fold lines, saidblank being flattened to have two adjacent side wall sectionsoverlapping and resting on two other adjacent side wall sectionsthereunder, each of said sections having a tongue extending respectivelyfrom its top and bottom ends, the tongues extending from said underadjacent sections being longer than said upper tongues to have endportions exposed beyond the overlapping upper tongues, and a plasticadhesive on and limited to the exposed end portions of said undertongues and also on the upper faces of the upper tongues at leastadjacent their respective side wall sections, said adhesive being latex.

4. For a set-up carton, a folded carton blank Y having side wallsections consecutively connected one with the other along corner foldlines, said blank being flattened to have two adjacent side wallsections overlapping and resting on two other adjacent side wallsections thereunder, each of said sections having a tongue extendingrespectively from its top and bottom ends, the tongues extending fromsaid under adjacent sections beinglonger than said upper tongues to haveend portions exposed beyond the overlapping upper tongues, and a plasticadhesive on and limited to the exposed end portions of said undertongues and also on the upper faces of the upper tongues, over theentire area thereof.

HARRY H. LINDLEY.

